In AABC, AB=BC. If m_A = 7x, and mZC = 2x + 50, find
m_B. (draw, label and mark a diagram).

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.